阻燃输送带就是完全不燃烧的输送带。（）
参考答案：错
填补倒凹的目的是为了_______、________、________。
On account of the development of the economy, the environment is seriously polluted and we must
________ the emission of the carbon dioxide.[ ]
A. cut in
B. cut off
C. cut up
D. cut down
